Pump or motor structure



Aug. 9, 1938. c. E. BROMAN PUMP OR MOTOR STRUCTURE Filed May 16, 1936 firin s.-

INVENTOR;

Gh arZeJ IE. Brornm ATTORNEYS;

Patented Aug. 9, 1938 UNITED STATES PATENT OFFICE County, Mich.

Application May 16, 1936, Serial No. 80,065

4 Claims.

- The present invention relates to rotary pump or fluid-driven motor structures; and its object is, generally, to provide such a structure improved in respects hereinafter appearing; and particularly, to provide such a structure which shall operate continuously, and very steadily and noiselessly; and further, to provide such a structure in which the driving power is exerted with great effeet; and further, to provide in such a structure a well balanced rotor; and further, to provide such a structure in which friction may be diminished; and further, to provide such a structure having a circuitous channel comprising angularly disposed portions into which the fluid is continuously and simultaneously admitted into operative contact with the pistons therein and from which the fluid is vented in like manner; and further,

to provide such a structure wherein the pistons are moved by the structure's operation into said portions of the channel alternately; and further, to provide in such a structure improved pistons.

These and any other and more specific objects hereinafter appearing are attained by, and the invention finds preferable embodiment in, the illustrative structure particularly described in the body'of this specification and illustrated by the accompanying drawing, in which:-'-

Figure 1 is an elevational view of a pump or motor structure embodying my invention, with the fluid intake pipe removed;

Figure 2 is a right hand-side view of the structure with the cover plate removed;

Figure 3 is a sectional view of the same, with the cover plate in place, taken on the diametrical line 3-3 of Figures 2 and 4;

Figure 4 is a sectional View line 4-4 of Figure 3;

Figure 5 is asectional on line 5-5 of Figures 1 and 3;

Figurefi is a right hand-side view, .with the cover plate removed and certain parts broken thereof taken on away to-show a modified construction of the pistons;

Figure 'l is a right hand-side view similar to Figure 2 but showing a slightly modified construction in whichthe fluid intake is in another angular position.

The body or casing l of the pump or motor structure illustrated ,by the drawing mounted as by bolts 2 on a suitable base has a chamber 3 with fluid intake port 4 and discharge port 5 and provided with a circular cover plate 6 removably held in place by'screws I. This cover plate has an inwardly extending circular rib 8 fitting inside the concentric flange 9 of the casing, and

view of the same taken has in its inner side a circular concentric recess bearing l0. From'the bottom ll of the casings chamber 3 a member I2 extends outwardly having a journal bearing l3.

This member l2, as shown, is formed of a separate piece seated in a curved rabbet l4 and is held in place by pins or screws l5. Said members curved inner side and the curved side of the casing form the circuitous chamber 3 between them of uniform width throughout. One portion ,of this chamber extends from the rotary axis of the structure farther than the opposite portion thereof extends. To effect this, the chamber is approximately ovate having a portion I6 whose parallel circular sides ll, l8 are spaced nearer said axis than are the circular sides i9, of the chambers opposite portion 2 l, these circular porlngs chamber 3. The outer curved side 3|] of the I rotors said rib is adjacent and as shown rotatably bears on the circular side I] of portion I6 of said chamber 'while the inner curved side 3| of said rib is adjacent and as. shown rotatably bears on the circular side IQ of the chambers opposite portion 2|.

The rotor carries pistons extending across and fitting in the chamber. These pistons 32 as shown'in Figures 2, 3, 4 and 7 are of cylindrical form (hollow to minimize weight) fittingly seated and turnably bearing in openings or gaps 33 through said rib. These pistons diameters equal the width of the chamber and of said openings, in which they .are freely moved or cammed radially of the rotor by the chambers portions 22 into or out of its said circular portions It or 2| so as to hear at their opposite sides on the opposite curved sides of the chamber in all rotated positions of the rotor, their ends bearing on the flat bottom of chamber 3 and on the flat inner side of the rotor.

It will be seen thatthe cha-mbers circular portions it and 2| form semicircular fluid channels in which the fluid passes along the inner side of the rotors rib in channel 16 and along theribs outer side in channel 2|, the fluid passing along both sides of the rib in the portions 22 of the chamber.

By passages branching between the structures intake port 4 and discharge port 5 the fluid is continuously admitted to and vented from both of said opposite portions I 6, 2| of said chamber. Into one of these passages the fluid is admitted at its inlet 35 from the structure's intake port 4 directly into portion 2| of the chamber through its curved outer side and operatively contacts that side portion of the pistons which extends outwardly from the rotor's rib 29 into said portion 2|, from which portion the fluid is vented at 36 into the structures discharge port 5.

The other passage admits fluid from its inlet 31 from the structure's intake port 4 whence it passes into this passages portion 38 and semicircular portion 39 in the casing behind the member l2 and thence through said members opening 40, which extends from its flat bottom 4| through its curved side, into the chambers portion I6 wherein the fluid operatively contacts, that side portion of the pistons which'extends inwardly from the rotor's rib 29 into the chambers said portion Hi, from which the fluid is vented through said passages opening 42, which extends from the curved side of member l2 through its bottom, and through the semicircular portion 43 and portion 44 of said passage in the casing behind member I2 and is vented at 45 into the structure's discharge port 5.

Themember l2 thus forms a transaxial partition between chamber 3 and the passages behind this member.

In Figure 6 pistons 32 of a usual form are shown extending through the rotor's rib 29 and turnably mounted at their smaller ends.

In Figure 7 the structure's intake pipe 50 is disposed at an angle of about 30 degrees above the intake pipe 50 of other views, the inlet 35 therefrom extendingas indicated in dotted lines to the chamber's portion 2|, thus better adapting the structure to, its use as a motor by avoiding shutting oil the fluid by the rotors rib 29 from entering into the chamber from said inlet.

'I'he structure's discharge pipe is shown at El, stufling boxes at 52, a wear washer at 53 and a packing ring 54 seated in an annular groove in the cover plate.

It will be seen that the operation of this pump or motor is very continuous, noiseless and steady and that the rotor is well balanced, the fluid being continuously admitted and vented from portions of the chamber simultaneously which are on opposite sidesof the axis of rotation; that the power is thus very effectively applied; and that the tumable pistons tend to reduce friction.

The invention being intended to be pointed out in the claims, is not to be limited to or by details of construction or arrangement of any particularembodiment thereof illustrated by the drawing or hereinbefore shown or described.

I claim: I

1. In a pump or motor structure of the class described: a rotor having a hub with the rotor shaft secured thereto and a concentric circular I rib; a casing having a circuitous chamber with a curved side wall comprising circular arcual portions concentric with and at different radial distances respectively from the shaft, and arcual portions connecting said circular portions; 9.

member detachably secured in the bottom of the chamber having a bearing wherein the rotor's hub rotatably bears, and a curved peripheral side comprising concentric circular arcual portions uniformly spaced from and registering angularly with corresponding circular portions respectively of the chambers side wall, said rib having gaps therethrough and being radially narrower than the chamber, extending therein and rotatably bearing at one of its curved sides on one of the circular portions of the chambers side wall and at its other curved side rotatably bearing on the opposite circularly curved portion of said member throughout extended arcs of contacts respectively, thus forming a pair of angularly spaced circular arcual fluid channels in the circuitous chamber at opposite sides respectively of the rib, one of the channels having angularly spaced inlet and outlet' ports; cylindrical pistons axially parallel with said shaft, fitting in said gaps and mov able sidewise therein into said channels alternately in closing relation therewith, the casing having also fluid passages formed therein and separated from the bottom of the chamber by said member and communicating through said prising concentric circular arcual portions and arcual portions connecting the same, all said arcual portions of said member's side being spaced from and registering angularly with corresponding arcual portions respectively of the chamber's side wall, said rib having gaps therethrough and being radially narrower than the chamber, extending therein and rotatably hearing at one of its curved sides on one of the circular portions of the chambers side wall and at its other curved side rotatably bearing on the opposite circularly curved portion of said mem-' ber, and spaced from both sides of the chamber in said connecting portions of its side wall, thus forming a pair of angularly spaced fluid channels in the circuitous chamber on opposite sides respectively of the rib, one of the channels having angularly spaced inlet and outlet ports; cylindrical pistons axially parallel with the ro tors axis, of a diameter equal to the width 01' the chamber and'of the gaps and movable sidewise in the gaps into said channels alternately in closing relation therewith; the casing having also fluid passages inwardly from the bottom of the chamber and communicating with the other channel forproviding a continuous flow of the fluid along opposite sides of the rib in said channelssrespectively and along both sides of the rib in the portions of the chamber which connect said channels, as governed by the rotors rotation. 4

3. In a pump or motor structure of the class described: a rotor having a side forming one flat wall of the hereinafter mentioned chamber and an inwardly projecting concentric circular rib; a. casing having a circuitous chamber with a curved side wall comprising circular arcual portions concentric with and at different radial distances respectively from the rotor's axis and arcual portions connecting said circular portions; a member in the bottom of the chamber having a curved peripheral side comprising circular arcual por tions and arcual portions connecting the last named circular arcual portions, all said arcual portions of said member's side being spaced from and registering angularly with corresponding arcual portions respectively of the chambers side wall, said rib being radially narrower than the chamber and extending therein and rotatably bearing at one ofits curved sides on one of the circular portions of the chamber's side wall and at its other curved side rotatably bearing on the opposite circularly curved portion of said member throughout extended arcs of contacts respectively, thus forming a pair of angularly spaced fluid channels in the circuitous chamber at opposite sides respectively of the rib one of the channels having angularly spaced inlet and outlet ports; pistons carried by the rotor and movable into said channels alternately in closing relation therewith, the casing having also rib; a casing having a circuitous chamber of uniform radial width with a curved side wall comprising circular arcual portions concentric with and at difierent radial distances respectively from the rotors axis, and arcual portions connecting said circular portions; a member in the chamber having a curved peripheral side comprising concentric circular arcual portions and arcual portions connecting the same, all said arcual portions oi said members side being spaced from and registering angularly with corresponding arcual portions respectively of the chambers side wall, said rib being radially narrower than the chamber, extending therein and rotatably bearing at one of its curved sides on one of the circular portions of the chambers side wall and at its other curved side rotatively,

bearing on the oppositecircularly curved portion of said member, and being spaced from both sidesot the chamber in. the arcual portions of the chamber which connect the circular portions thereof, thus forming angularly sp'aced fluid channels in the circuitous chamber on opposite sides respectively of the rib; pistons carried by the rotor movable into the channels alternately in closing relation therewith.

. CHARLES E. BROMAN. 

